Master_Bass posted...I can at least tell you he's not using Firefox.
I get the "not supported" message with Firefox. I'm guessing Sony's web code works about as well as ... most of their other software.
And ... as is usual for Sony's error messages ... there's no clue as to what the site's looking for that Firefox isn't providing.
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My game collection: http://chemicalburrito.com
Now: Ni no Kuni (PS3), P4G (PSV), Star Ocean 2E (PSP)